<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h2>登录</h2>
    <form action="/dologin" method="get" enctype="application/x-www-form-urlencoded">
        <input name="username" placeholder="输入用户名"><br><br>
        <input name="password" placeholder="输入密码"><br><br>
        <input type="submit" value="登录"><br><br>
    </form>
</body>
</html>

<style>
    h2{
        color: red;
    }
</style>